Dimension:OD 48.26-114.3mm WT 3.18-16mm
Grade:JSS, N80-1,N80-Q, L80-1, L80-9Cr,L80-1,C90, T95, C95, P110 .
Thread types:NUE,EUE etc.
Standards and Technical Conditions for Supply:API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
Tubing are used as pipe to transport crude oil or natural gas from layer of the oil to surface, can hear better pressure during oil or gas production, and have smaller diameters.
Tubing is a relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the field surface facilities for processing. Tubing must be adequately strong to resist loads and deformations associated with production and workovers. Further, tubing must be sized to support the expected rates of production of oil and gas.
API 5CT Tubing | Range 1 | Range 2 | Range 3 |
| 6.10~7.32 | 8.53~9.75 | 11.58~12.80 |
Casing&tubing and their colors:
Label | OD (mm) | WT (mm) | Type of End-finish | |||||||||
NU T&C | EU T&C | IJ | H40 | J55 | L80 | N80 | C90 | T95 | P110 | |||
1.9 | 2.75 | 2.9 | 2.76 | 48.26 | 3.68 | PNUI | PNUI | PNUI | PNUI | PNUI | PNUI | – |
1.9 | 3.65 | 3.73 | – | 48.26 | 5.08 | PU | PU | PU | PU | PU | PU | PU |
1.9 | 4.42 | – | – | 48.26 | 6.35 | – | – | P | – | P | P | – |
2 3/8 | 4 | – | – | 60.32 | 4.24 | PU | PN | PN | PN | PN | PN | – |
2 3/8 | 4.6 | 4.7 | – | 60.32 | 4.83 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
2 3/8 | 5.8 | 5.95 | – | 60.32 | 6.45 | – | – | PNU | PNU | PNU | PNU | PNU |
2 3/8 | 6.6 | – | – | 60.32 | 7.49 | – | – | P | – | P | P | – |
2 3/8 | 7.35 | 7.45 | – | 60.32 | 8.53 | – | – | PU | – | PU | PU | – |
2 7/8 | 6.4 | 6.5 | – | 73.02 | 5.51 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
2 7/8 | 7.8 | 7.9 | – | 73.02 | 7.01 | – | – | PNU | PNU | PNU | PNU | PNU |
2 7/8 | 8.6 | 8.7 | – | 73.02 | 7.82 | – | – | PNU | PNU | PNU | PNU | PNU |
2 7/8 | 9.35 | 9.45 | – | 73.02 | 8.64 | – | – | PU | – | PU | PU | – |
2 7/8 | 10.5 | – | – | 73.02 | 9.96 | – | – | P | – | P | P | – |
3 1/2 | 7.7 | – | – | 88.9 | 5.49 | PN | PN | PN | PN | PN | PN | – |
3 1/2 | 9.2 | 9.3 | – | 88.9 | 6.45 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
3 1/2 | 10.2 | – | – | 88.9 | 7.34 | PN | PN | PN | PN | PN | PN | – |
3 1/2 | 12.7 | 12.95 | – | 88.9 | 9.52 | – | – | PNU | PNU | PNU | PNU | PNU |
3 1/2 | 14.3 | – | – | 88.9 | 10.92 | – | – | P | – | P | P | – |
3 1/2 | 15.5 | – | – | 88.9 | 12.09 | – | – | P | – | P | P | – |
4 | 9.5 | – | – | 101.6 | 5.74 | PN | PN | PN | PN | PN | PN | – |
4 | 10.7 | 11 | – | 101.6 | 6.65 | PU | PU | PU | PU | PU | PU | – |
4 | 13.2 | – | – | 101.6 | 8.38 | – | – | P | – | P | P | – |
4 | 16.1 | – | – | 101.6 | 10.54 | – | – | P | – | P | P | – |
4 1/2 | 12.6 | 12.75 | – | 114.3 | 6.88 | PNU | PNU | PNU | PNU | PNU | PNU | – |
4 1/2 | 15.2 | – | – | 114.3 | 8.56 | – | – | P | – | |||
API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
Mechanical Properties
钢级Grade | 类型Type | 加载下的总伸长率Total elongation under load % | 屈服强度Yield Strength M pa | 抗拉强度Tensile strength min Mpa | 硬度Hardness | 规定壁厚 Specified wall thickness mm | 允许硬度变化Allowable hardness variation | ||
HRC | |||||||||
min | max | HRC | HBW | ||||||
J55 | – | 0.5 | 379 | 552 | 517 | – | – | – | – |
K55 | – | 0.5 | 379 | 552 | 655 | – | – | – | – |
N80 | 1 | 0.5 | 552 | 758 | 689 | – | – | – | – |
Q | 0.5 | 552 | 758 | 689 | – | – | – | – | |
M65 | – | 0.5 | 448 | 586 | 586 | 22 | 235 | – | – |
L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – |
9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – | |
13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – | |
C90 | 1、2 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | ≤12.70 | 3.0 |
1、2 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | 12.71-19.04 | 4.0 | |
1、2 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | 19.05-25.39 | 5.0 | |
1、2 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | ≥25.4 | 6.0 | |
C95 | – | 0.5 | 655 | 724 | 724 | – | – | – | – |
T95 | 1、2 | 0.5 | 655 | 724 | 724 | 25.4 | 255 | ≤12.70 | 3.0 |
1、2 | 0.5 | 655 | 724 | 724 | 25.4 | 255 | 12.71-19.04 | 4.0 | |
1、2 | 0.5 | 655 | 724 | 724 | 25.4 | 255 | 19.05-25.39 | 5.0 | |
1、2 | 0.5 | 655 | 724 | 724 | 25.4 | 255 | ≥25.4 | 6.0 | |
P110 | – | 0.6 | 758 | 965 | 862 | – | – | – | – |
Q125 | All | 0.65 | 862 | 1034 | 931 | b | – | ≤12.70 | 3.0 |
All | 0.65 | 862 | 1034 | 931 | b | – | 12.71-19.04 | 4.0 | |
All | 0.65 | 862 | 1034 | 931 | b | – | ≥19.05 | 5.0 | |
Chemical Composition
Standard | Grade | Composition（%） | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | AIs | ||
API SPEC 5CT | J55 | 0.34～0.39 | 0.20～ | 1.25～1.50 | ≤0.020 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.20 | ≤0.020 | ||
K55· | ||||||||||||
N80 | 0.34～0.38 | 0.20～ | 1.45～1.70 | ≤0.020 | ≤0.015 | ≤0.15 | / | / | / | 0.11 | ≤0.020 | |
L80 | 0.15～0.22 | ≤1.00 | 0.25～1.00 | ≤0.020 | ≤0.010 | 12.0～ | ≤0.20 | ≤0.20 | / | / | ≤0.020 | |
P110 | 0.26～0.35 | 0.17～ | 0.40～0.70 | ≤0.020 | ≤0.010 | 0.80～ | ≤0.20 | ≤0.20 | 0.15 | ≤0.08 | ≤0.020 | |